Double feed roll lift mechanism
US4364505A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 30, 1981 |
| Grant date | Dec 21, 1982 |
| Priority date | — |
| Expiry date | Jan 30, 2001 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21D43/09
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
The invention relates to a hydraulically actuated feed roll lift mechanism for feeds utilized to feed strip stock into a machine, such as a mechanical press. Regulated hydraulic pressure acting against a piston that is connected to one of the feed rolls through a yoke forces the feed roll against the stock to grip the stock and cause an increment thereof to be fed into the press when the rolls are rotated. A roll opening cam, which is connected to the press crankshaft, advances a small piston to displace oil against the other side of the piston while the stock is at rest to thereby separate the rolls during the time that the dies are in contact with the stock in the press. The time at which roll separation is initiated is controlled by adjusting the angular position of the cam on its shaft, as by releasing a frictional lock mechanism, rotating the cam to the desired position, and then again locking it in place. The invention is particularly related to a double feed roll system wherein opposing feed rolls are located at the infeed and outfeed sides of the press so that the stock is both pushed and pulled therethrough. Identical cam roll lift mechanisms are utilized for both of the p…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.